Exploring the limits of TEM-EELS

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The prospects of nanotechnology have provided additional impetus for the use of electron electron microscopes to examine the detailed structure of small objects, less than 100nm in size and down to the atomic scale. Physicists have devised techniques for extracting the maximum amount of information on such a small scale. One of these is electron energy-loss spectroscopy (EELS), usually carried out in a transmission electron microscope (TEM). In TEM-EELS, the energy exchange between incoming electrons and atoms of the specimen is analyzed in detail, to provide information about chemical composition and structure on an atomic scale. Further progress in this technique requires increased knowledge about the physics of the interaction of electrons with matter, and this research proposal is aimed at providing such knowledge.